摘要
上窄下宽的地质结构,独立的基岩断裂体系以及多期的构造活动,是大民屯凹陷负向构造基岩油气成藏的基本条件;凹槽区受断裂活动控制,基岩更易发生碎裂,形成有利的储集空间;凹槽区厚层泥岩及存在的地层超压,为基岩提供充足的油源和良好的封盖条件。具备上述油气成藏条件,大民屯凹陷实现了对负向构造基岩勘探的突破。
The peculiar structure of narrow top and wide bottom, independent bedrock faults system and multistage tectonic activities, are the basic conditions of Damintun sag reservoir with the negative structure bedrock. While thick mudstone and stratum with overpressure provide sufficient oil source and good sealing conditions for the groove bedrock. And as the active plate for the relative movement, the groove bedrock fractures more intensively than the passive plate, thus it is more favorable to form reservoir space. All of the above results in the exploration success for the bedrock of negative structure in Damintun sag.
出处
《当代化工》
CAS
2014年第8期1502-1503,共2页
Contemporary Chemical Industry
关键词
油气成藏条件
凹槽区基岩
大民屯凹陷
Petroleum accumulation conditions
Groove bedrock
Damintun sag
